Most of them are being thrown into the entry job that people are claiming "couldn't be filled anyways". I remember hunting for my first job as a teenager and it was pretty difficult, not a lot of openings, even less willing to take someone with zero experience. I'm not even that old, that was maybe 7-8 years ago.
Many of these locations have a bias in their hiring as well, they gift their family and friends positions in these companies, refusing to work with anyone else. I seriously cannot remember the last time I have seen someone who isn't Indian working at Tim Hortons.
I cannot imagine having to find a first job as a 16/17/18 year old.